<?php
/**
 * Agent.php UTF-8
 * 广告渠道处理
 *
 * @date    : 2018/3/27 22:36
 *
 * @license 这不是一个自由软件，未经授权不许任何使用和传播。
 * @author  : wuyonghong <wyh@huosdk.com>
 * @version : HUOSDK 8.0
 * ADDED by wuyonghong BEGIN 2018/3/27 ISSUES:5283  IOS 广告
 */

namespace ads;
class Agent {
    private $agent_game_id = 0;
    private $start_key     = 'hy';
    private $channel_id    = '271';

    public function __construct() {
        $this->start_key = 'hy'; /* 读取配置 */
//        $this->channel_id = '';/* 读取配置 */
    }

    /**
     * @param string $string 原串
     *
     * @return int agent_game_id 默认为0
     */
    public function getIdByCode($string) {
        $_string = $string;
        /* 1 判断是否合法 */
        if (!preg_match("/^[A-Za-z0-9]+$/", $_string)) {
            return 0;
        }
        /* 1.1 判断前两位是否正确 */
        $_check_start_key = substr($_string, 0, 2);
        if ($_check_start_key != $this->start_key) {
            return 0;
        }
        /* 1.2 判断渠道编号是否正确 */
        $_check_channel_id = substr($_string, 2, 7);
        if ($_check_channel_id != $this->channel_id) {
            return 0;
        }
        /* 1.3 判断校验码是否正确 */
        $_check_sum = substr($string, -1);
        $_sub_str = substr($_string, 0, -1);
        $_check_check_num = $this->genCheckNum($_sub_str);
        if ($_check_check_num != $_check_sum) {
            return 0;
        }
        /* 2 获取agent_game_id */
        $_agent_str = substr($string, 9, 6);
        $_agent_game_id = base_convert($_agent_str, 36, 10);
        if (!is_numeric($_agent_game_id)) {
            return 0;
        }

        return intval($_agent_game_id);
    }

    /**
     * 生成渠道编码
     * 1. 运营平台标识  hy
     * 2. 运营平台编号  7位数字 不足7位 前面补0
     * 3. 代理编号(字符串) 6位
     * 4. 最后一位 校验码  0-9   与身份证验证方法同理
     *
     */
    public function genAgentCode() {
        $_start_key = $this->start_key;
        $_channel_id = $this->getChannelStr();
        $_agent_str = $this->genAgentStr();
        $_string = $_start_key.$_channel_id.$_agent_str;
        $_check_num = $this->genCheckNum($_string);

        return $_string.$_check_num;
    }

    /**
     * 生成渠道字符串
     *
     * @return string
     */
    private function genAgentStr() {
        $_str = base_convert($this->agent_game_id, 10, 36);
        $_bit = 6;//产生7位数的字符串
        $_str_len = strlen($_str);
        $_zero = '';
        for ($_i = $_str_len; $_i < $_bit; $_i++) {
            $_zero .= "0";
        }

        return $_zero.$_str;
    }

    private function getChannelStr($string = '') {
        $_str = $string;
        if (empty($string)) {
            $_str = $this->channel_id;
        }
        $_bit = 7;//产生7位数的字符串
        $_str_len = strlen($_str);
        $_zero = '';
        for ($_i = $_str_len; $_i < $_bit; $_i++) {
            $_zero .= "0";
        }

        return $_zero.$_str;
    }

    /**
     * 生成校验码
     *
     * @param $string
     *
     * @return bool|mixed
     */
    private function genCheckNum($string) {
        /* 英文字符 */
        if (!preg_match("/^[A-Za-z0-9]+$/", $string)) {
            return false;
        }
        /* 加权因子 */
        $_factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8);
        /* 校验码对应值 */
        $_verify_number_list = array('1', '0', '9', '8', '7', '6', '5', '4', '3', '2');
        $_checksum = 0;
        $_count_factor = count($_factor);
        for ($_i = 0; $_i < strlen($string); $_i++) {
            $_temp = substr($string, $_i, 1);
            $_temp = ord($_temp) % 10;
            $_factor_i = $_i % $_count_factor;
            $_checksum += ($_temp * $_factor[$_factor_i]) % 10;
        }
        $_mod = $_checksum % 10;
        $_verify_number = $_verify_number_list[$_mod];

        return $_verify_number;
    }

    /**
     * @return int
     */
    public function getAgentGameId() {
        return $this->agent_game_id;
    }

    /**
     * @param int $agent_game_id
     */
    public function setAgentGameId($agent_game_id) {
        $this->agent_game_id = $agent_game_id;
    }

    /**
     * @return string
     */
    public function getStartKey() {
        return $this->start_key;
    }

    /**
     * @param string $start_key
     */
    public function setStartKey($start_key) {
        $this->start_key = $start_key;
    }

    /**
     * @return string
     */
    public function getChannelId() {
        return $this->channel_id;
    }

    /**
     * @param string $channel_id
     */
    public function setChannelId($channel_id) {
        $this->channel_id = $channel_id;
    }
}